Jack_Sprat

Hi, has anyone here tried, or come across an example of, creating hinged opening greenhouse roof vents using 'on-rafter' aluminium glazing bars? To make things a little more complicated, ideally, we're looking to make them bottom-hinged. I've seen the prefabricated roof vent offerings from Howells and Ultraframe, but I'm primarily interested in a site-built solution. I'll post up a drawing of where I'd got to thinking about this, presently. thanks for reading - JS